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SN74HCT139DR brand manufacturers: National Semiconductor, Anli stock, SN74HCT139DR reference price.National Semiconductor. SN74HCT139DR parameters, SN74HCT139DR Datasheet PDF and pin diagram description download.You can use the SN74HCT139DR Logic - Signal Switches, Multiplexers, Decoders, DSP Datesheet PDF, find SN74HCT139DR pin diagram and circuit diagram and usage method of function,SN74HCT139DR electronics tutorials.You can download from the Anli.